Komatsu 930E-2 - Pump Gear Timing; Pump Rotation Check

21. Install rear drive gear (1) and idler gear (13). The
rear drive gear must be timed with the front drive
gear. This is accomplished by lining up a tooth on
the rear drive gear with the valley of two teeth on
the front drive gear, as shown in Figure 3-16.
22. Repeat steps 15 and 16 for installation of the
remaining pressure plate, steel rings, backup ring,
O-ring, and retainer and isolation plate.
23. Lubricate and install O-ring (24, Figure 3-15) in
connector plate (11). Install dowel (23) if removed.
Lubricate I.D. of bearing in the connector plate
(11). Install connector plate (11) with flat washers
and nuts.
24. Install dowel (22) if removed. Lubricate and posi-
tion O-ring (17) in transition plate (16). Assemble
bearing plate (15) to transition plate and install
capscrews (14). Tighten capscrews to standard
torque.
25. Lubricate O-ring (21) and position on bearing plate
(15). Install the assembled bearing plate and tran-
sition plate (15 & 16) to the connector plate (11)
and secure in place with nuts (20). Tighten nuts to
standard torque.
26. Lubricate the thru stud threads and install two
opposite stud nuts and hardened washers. Tighten
nuts to 240 to 250 ft lbs (325 to 339 N.m) torque.
27. Using an 18 inch (45 cm) adjustable wrench, check
pump drive shaft rotation. The drive shaft will be
tight but should turn freely with a maximum of 5 to
10 ft lbs (7 to 14 N.m) torque, after the initial
surge. (Figure 3-17.)
28. If the shaft will not turn properly, disassemble the
pump and examine the parts for burrs or foreign
material causing buildup or interference between
parts.
29. When the input shaft turns properly install the
remaining hardened washers and nuts. Tighten
nuts to 240 to 250 ft lbs (325 to 339 N.m) torque.
30. Install a new O-ring on steering pump flange and
install steering pump to the transition plate (16,
Figure 3-15). Install capscrews and tighten to
standard torque.
FIGURE 3-16. PUMP GEAR TIMING
FIGURE 3-17. PUMP ROTATION CHECK
1. Wrench 3. Pump2. Input Shaft
L3-12 Hydraulic Component Repair L03027